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Power system stabilizer and controlled series capacitor small-signal stability performance analysis

Fourie, Gert (2002-12)

Thesis (MScEng)--University of Stellenbosch, 2002.

Thesis

ENGLISH ABSTRACT: This thesis presents results of a study on the small-signal stability of a single-machine
infinite-bus power system. Conditions of generator loading and network impedance are
identified that require additional stability support. Two methods of stability enhancement are
investigated, namely the power system stabilizer and the controlled series capacitor. Both
stabilizers employ the conventional (classic) control structure, and parameters are evaluated
for optimum performance using an integral-of-the-squared-error-based method. Results for
damping capability versus generator loading and system impedance were generated. The
ability of the power system stabilizer and controlled series capacitor to provide stability
support is compared. This comparison is based on (a) the ability to provide more damping
torque when needed, and (b) the amount of damping torque contributed by the stabilizer.